I need a second hand GoPro H2 with a WiFi bacpac but the previous owner lost WiFi password (he didn't used it for a while).
As per the documentation, I need to reset it using GoPro Studio which is unfortunately m$ only.

I installed Wine, installed GPS w/o trouble or error message. But I'm not able to launch it

I can't really tell anything for certain, but I might guess that requires a dotNet installation (i.e., you may or may not be able to get it to run with Wine mono).

For that, I would recommend using winetricks.

I might also suggest you try running it in a 32-bit prefix, which is likely needed for when you install dotNet. For how to create one, I once wrote a quick guide at our wikki. Though I've been meaning to improve upon it a lot, it should give out the basics. The WineHQ of course contains the info as well, as do many other fair sites.

From the GoPro website, I discerned that it requires QuickTime as well. You may or may not have much luck with that... (I really can't remember when I tried anything QuickTime related via Wine, but I have a bad feeling about it just from thinking of it.)_________________Kind Regards,
~ The Noob Unlimited ~